Signaling transmission test and control circuit



Jan. 7, 1958 H. F. sHoFFsTALL SIGNALING TRANSMISSION TEST AND CONTROL CIRCUIT Filed July 1e, 1956 53 Sheets-Sheet 1 /N VEN TOR H. f? sHoFFAsTA L Jan. 7, 1958 H. F. s'HoFFs'rALL.

SIGNALING TRANSMISSION TEST AND CONTROL CIRCUIT Filed July 16, 1956 35 Sheets-Sheet 2 H. SHOFFSTALL AGENT Jan. 7, 1958 H. F. sHoFFsTALL.

SIGNALING TRANSMISSION TEST AND CONTROL CIRCUIT Filed July 1 6, 1956 55 Sheets-Sheet 3 AGENT /Nl/ENTOR Jan. 7, 1958 H. F. sHoFFs'rALL 2,819,354

sICNALINC TRANSMISSION TEST AND CONTROL CIRCUIT kriled July 16, 1956 s3 sheets-sheet 4 una. 1, 195s H. F SHOFFSTALL` SIGNALINGTRANSMISSIQN TEST -AND CONTROL CIRCUIT v 35 Sheets-Sheet 5 Fiied .my 16. 1956 AGENT Jan. 7, 1958 H. F. sHoFFsTALL STGNALTNG rRANsMTssIQN` TEsT AND CONTROL CIRCUIT Filed July 16, 195e 'l 53 Sheets-Sheet 6 Mkb QOQhOU a G UY 2kb kul um@ ky:

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Jan, 7, 1958 y H. F. sHoFFs'rALL 'SICNALINC TRANsMissIoN 'TEST AND CONTROL CIRCUIT Filed .my 1s, 195e 33 Sheets-Sheet '7 AGENT H. F. SHOFFSTALL Jan. 7, 195s SIGNALING TRANSMISSION TEST AND CONTROL CIRCUIT Filed .m19 16. 1956 ss sheets-'sheet 's WEA/ro@ H -F SHO'FFSLL M 67% AGE/vf Jam 7, 1958 H. F. sHoFFsTALl.

SIGNALING TRANSMISSION TIsT AND CONTROL CIRCUIT Filed July 16. 1956 55 Sheets-Sheet 9 AGENT Jan. 7, 1958 H. F. sHoFFsTALL SIGNALING TRANSMISSION TEST -AND CONTROL CIRCUIT Filed .my 1e, 1956 33 Sheets-Sheet 10 /NVE/VTOIQ H. FSHOFFSALL By Mp4. AGENT Jan. 7, 1958 2,819,354

SIGNALING TRANSMISSION TEST AND CONTROL CIRCUIT FiIed July 1e, 195e H. F. sHoFFsTALL 35 Sheets-Sheet 1l Si ms QYQ. SomfQ /VVENTO/Q H 'SHOFFSTALL AGE/VT Jan. 7, 1958 H. F. SHOFFSTALL SIGNALING TRANsMTssIoN TEST AND CONTROL CIRCUIT FiledvJuly 16, 1956 33 Sheets-Sheet 12 QV@ GEN Ql Sum.

AGENT SIGNALING TRANSMISSION TEST AND CONTROL CIRCUIT Filed July. 16, 1956 Jan. 7 1958 H. F. sHoFFsTALL 33 Sheets-Sheet .13

QYQ. SONG /NVE/VTO H FS/-OFFSLL By M AGENT Ql $6.06 Q11 $3 Jan. 7, 1958 H. F. sHoFFs'rALL SIGNALING TRANSMISSION TEST AND CONTROL CIRCUIT Filed July 16, 1956 33 Sheets-Sheet 14 AGENT Jan. 7, 1958 H. F. sHoFFsTALL '2,819,354

SIGNALING TRANSMISSION `'TEST AND CONTROL CIRCUIT Filed July 1-, 1956 A 33 Sheecs-Sheexl 15 l/Vl/ENTOR AGENT Jan. 7, 1958 H. F. sHoFFsTALL 2,319,354

sIGNALING TRANSMISSION TEST AND coNTRoL CIRCUIT Filed July 1e, 1956 sa sheets-sheet Ie NVENTOR AGENT Jan. 7, 1958 H. F. sHoFFs'rALL 2,819,354

SIGNALTNG TRANSMISSION TEST AND CONTROL CIRCUIT Filed July. 1e, 195e SS Sheets-Shea 17 FROM NEAR- FAR MEASU/P/NG AND CHECA PAD C/f /NVENTOR H E SHOFFSTALL BVM.

AGENT Jan. 7, 1958 H. F. sHoFFsTALL 2,819,354

sIGNALING TRANsMIssIoN TEST AND CONTROL CIRCUIT Filed .my Ie, 195e srs sheets-sheet 1a on MURE /Nz/ENTOR H E SHOFFSALL BVM ` AGE/vr Jan. 7, 1958 H. F. sHoFFs'rALL 2,819,354

SIGNALING TRANSMISSION `'TEST AND CONTROL CIRCUII1 Filed July 1e, 195e as sheets-sheet 19 7'0 CONTROL i C/fT UNDER 5 Avlam/TOR lH. E SHOFFSTALL Jan. 7, 1958 H. F. sHoFFsTALL 2,819,354

sIGNALING 'IRANsMIssIoN TEST AND coNIRoL CIRCUIT Filed .my 1s, 195e ss sheets-sheet zo XTP /NVEA/rof? hf SHOFFSTALL AGENT FIG. Z3 

